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NVIDIA problem

I need help. If anybody can be so kind to with NVIDIA driver installation under BackTrack 5 R2 64 bit.
I am trying already two month to solve this problem on my laptop and I don’t know how many different drivers
and online tutorials I try without any success. Last few days this issue is really frustrate me.
Laptop SONY VPCCW17FX
01:00.0 VGA compatible controller [0300]: nVidia Corporation GT218 [GeForce G210M] [10de:0a74] (rev a2)

Using: nvidia-installer ncurses user interface
-> License accepted.
-> Installing NVIDIA driver version 295.33.
-> Performing CC sanity check with CC="cc".
-> Performing CC version check with CC="cc".
ERROR: Unable to find the kernel source tree for the currently running kernel. Please make sure you have installed the kernel source files for your kernel and that they are properly configured; on Red Hat Linux systems, for example, be sure you have the 'kernel-source' or 'kernel-devel' RPM installed. If you know the correct kernel source files are installed, you may specify the kernel source path with the '--kernel-source-path' command line option.
ERROR: Installation has failed. Please see the file '/var/log/nvidia-installer.log' for details. You may find suggestions on fixing installation problems in the README available on the Linux driver download page at www.nvidia.com.

Uninstall the nouveau driver and blacklist it. You have 3 ways of doing this. Using init, rebooting with recovery mode and with terminal in BT session directly.
if using the last option, need to reboot once you have uninstalled and blacklisted, then enter in recovery Mode.

Install the nvidia driver you previously downloaded.

Reboot.

Now check if you have 3d support: type glxgears, or type glxinfo | grep direct

One thing that can happen when using nvidia propietary drivers, you can have many problems if there is a change in kernel version, let's say 2.6.38 and it cahnges to a new one like 3.2.0..You will need to reinstall drivers. Just an observation.